Vacuum cleaner



E. FABER VACUUM CLEANER Feb. 8, 1938.

Filed Sept. 17, 1935 Patented Feb. 8, 1938 g 1 UNITED STATESPATENTOFFICEH 'miii'afl 'ErnstFabenShlttmGermlny Application September11, 19:5, semi No. 40,905 In Germany January 4; 1935 8 Claims. (Cl.230-232) My invention relates to vacuum cleaners and rection of thearrows through the passage behas for one of its objects to provide meanswheretween the parts It and I8 into the hollow cover by the soundgenerated through the operation It and through the passage between thecap of the device is deadened to a considerable exand the cover andthrough the screen It into ex- 5 tent. haust It as indicated by thearrows. The air With this and other objects in view I will now does notanywhere strike'a side wall of the shell describe my invention withreference to the draw- I, being prevented from doing so by the casinging aflixed to this specification and forming part 3 and by the shieldI. which twice reverses the thereof which illustrates the rear half of avacdirection and thereby alters the sectional area 10 uum cleanerembodying my invention in diagramof the air current. 10 rnatic axialsection by way of example. e S ee me casing 3 being s pp Referring tothe drawing, I is the outer shell gether with theflmotor and fanenclosed therein, of the vacuum cleaner which preferably consistsbetween the thiclr rubber ring 4 and the rubber of artificial resin orsome other sound deadening us n l5 wi l ot ve e to y at o 5 material and2 is the filter bag into which -is which might create loud noise. Anysound s sucked the air, laden with the dust, which enters urthe de denedqu pa tic a y by t e Ou er through an inlet (not shown). 3 is a casingopen s ll and the cylindrical sl eve l coverin the at both ends and heldin place in the shell by exhaust l3 and by the to t o s P ed for meansof the rubber ring 4 abutting against a e air be e D s d H 0 t e ring 22of artificial resin and a cap 5, which will hand and 5 and II on theother hand. A further 20 be referred to in detail farther below. 1; isthe d adenin f so nd i pr y the p d electromotor driving the fanenclosed in the casc a e 0 e cross-Sect o a eas av ed y ing, the shaft 1of the mot r being supported in the air current. The elastic mounting ofthe ball bearings 8 located in a box 9. III is a cover motor a d a t dt0 t casing Which is 25 fixed to the front end of theshell i by means pn d ween th rub r rin 4 and r e 25 f scr w bolt II, thi cover beingformed of mblock l5 prevents the vibrations generated by the ficlalresin or some other suitable material havmotor from being tted Onto theOuter ing sound deadening and insulating properties. Shell and creat ngsound waves.

/ I2 is a short inwardly directed tube surrounding The shell I d coverbe ma e of art the exhaust opening III of the cover and I4 is a fl aresin 0 the like. p t o deadening fine-meshed wire gauze or fabriccylinder or Sound, also form a P o io r e pe a o 's sleeve mounted onthis tube and forming a screen. gers a a st the ac ion of the electriccur- 5 is the cap placed on this cylinder and surrounding same with a.clearance and I5 is a rubber The arrangement the pa iS Such at y ,5block inserted between the bearing box 9 and the Vibratory motion o e sng the shield I 6 cap 5 Between th l ti bl k l5 and t cap and cap 5 aswell as cover ID are counteracted as 5 is inserted the central portionof a shield l6 Possible b their elastic S pp t and the which is opensideways of the casing 3 and acts air sucked through the apparatus isconducted in as an air guide, which is thus held in position a pathwhich further reduces the possibility of 40 between the rubber block l5and the cap 5 which sound generation. Owing to its large surface the 40latter is fixed to and spaced from the cover Ill ee e-S ap d Sieveexerts a Pa a y e by means of spacing blocks I'I. feetful ade acti Therear portion of the casing 3 tapers in- I wish it to be understood thatI do not desire wardly at l8 leaving a wide passage 24 for the to belimited to the exact details of construction 46 air between its inneredge l9 and the bearing box shown and described for obviousmodifications 9. 20 is a ring-shaped layer of felt or some other willoccur to a person skilled in the art. sound deadening material coatingthe inner face In the claims afllxed to this specification no of therear portion it of the casing and 2| is a selection of any particularmodification of the cylindrical layer of felt or some other textileinvention is intended to the exclusion of other 50 material coating theinner cylindrical portion of modifications thereof and the right tosubse- 50 the shield l6. quently m'ake claim in the present applicationto In the operation of the device the air is sucked any modification notcovered by these claims is through the filter bag 2, in which the dustis deexpressly reserved.

posited, and the clean air further flows past the I claim: 56 motor 6enclosed by the casing 3 and in the di- 1. In a vacuum cleaner incombination, a s

formed with an air exhaust, a sleeve-shaped screen covering saidexhaust, a. cap embracing said screen and arranged to lead the air ontosaid screen in reversed direction, a casing open at both ends withinsaid shell, a motor and fan unit accommodated in said casing, a shieldembracing said casing and arranged to twice reverse the direction of theair, which leaves the casing, and elastic means supporting said casingand shield.

2. In a vacuum cleaner in combination, a shell formed with an airexhaust, a sleeve-shaped screen covering said exhaust, a casing open atboth ends within said shell, a motor and fan unit accommodated in saidcasing, a cap-shaped shield covering the end wall and axial exhaustopening of said casing and arranged to twice reverse the direction ofthe air, which leaves the casing, and elastic means supporting saidcasing in said shell.

3. In a vacuum cleaner in combination, a shell of insulating material, acover of insulating material closing one end of said shell and beingformed with an exhaust, a sleeve-shaped screen covering said exhaust, acasing open at both ends within said shell, 2. motor and fan unitaccommodated in said casing, a cap-shaped shield covering the end walland axial exhaust opening of said casing and arranged to twice reversethe direction of the air, which leaves the casing, and elastic meanssupporting said casing in said shell.

4. In a vacuum cleaner in combination, a shell formed with an airexhaust, a sleeve-shaped screen covering said exhaust, a cap embracingsaid screen and arranged to lead the air onto said screenin reverseddirection, a casing open at both ends within said shell, a motor and fanunit accommodated in said casing, a cap-shaped shield covering the endwall and axial exhaust opening of said casing and arranged to twicereverse the direction of the air, which leaves the and elastic meansbetween said casing and said shell on the one and said cap on the otherhand supporting said casing.

5. In a vacuum cleaner in combination, a shell formed with an airexhaust, a sleeve-shaped screen covering said exhaust, a cap embracingsaid screen and arranged to lead the air onto said screenin reverseddirection, a casing open at both ends within said shell, a motor and fanunit accommodated in said casing, a. cap-shaped shield covering the endwall and axial exhaust opening of said casing and arranged to twicereverse the direction of the air, which leaves the casing, an elasticsupportin means inserted between said casing and said shell and anelastic insertion between said motor and said cap.

6. In a vacuum cleaner in combination, a shell formed with an airexhaust, a sleeve-shaped screen covering said exhaust, a cap embracingsaid screen and arranged to lead the air onto said screen in reverseddirection, a casing open at both ends within said shell, :1. motor andfan unit accommodated in said casing, an elastic supporting meansinserted between said casing and said shell, an elastic insertionbetween said motor and said cap, and, joined to said latter elasticinsertion, a cap-shaped shield covering the end wall and axial exhaustopening of said casing and arranged to twice reverse the direction ofthe air leaving said casing.

7. In a vacuum cleaner in combination, a shell formed with an airexhaust, a sleeve-shaped screen covering said exhaust, a cap embracingsaid screen and arranged to lead the air onto said screen in reverseddirection, a casing open at both ends within said shell, a coating ofsound deadening material on the rear portion of said casing, a motor andfan unit accommodated in said casing, an elastic supporting meansinserted between said casing and said shell, an elastic insertionbetween said motor and said cap, joined to said latter elasticinsertion, a cap-shaped shield covering the end wall and axial exhaustopening of said casing and arranged to twice reverse the direction ofthe air leaving said casing, and a coating of sound deadening materialon the end portion of said shield.

8. In a vacuum cleaner in combination, a shell formed with an airexhaust opening, an inwardly directed tubular member surrounding saidexhaust opening, a sleeve shaped screen mounted on and surrounding saidtubular member, means for guiding a radially inwardly directed aircurrent onto the outer wall of said screen, a casing open at both endswithin said shell, a motor and fan unit accommodated in said casing anda capshaped shield covering the end wall and axial exhaust opening ofsaid casing and arranged to twice reverse the direction of the air.

' ERNST FABER.

